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Massey Harris & Massey Ferguson Tractors Discussion Forum
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another lift question

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gator

09-20-2004 21:05:21




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i have a mf85.my box blade wont stay up.it moves down slowly and seems to start dropping faster as the tractor warms up.....any ideas.im new at this.i just bought the ttrsactor last week.my first one.




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marlowe

09-21-2004 04:02:16




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 Re: another lift question in reply to gator, 09-20-2004 21:05:21  
it can be a lot of things wrong. first it can be just wore out but more then likley your pump is wore or lift piston is bad or just a leak in the system. dose your PTO work right? as to getting worse as it gets warmer thats because the oil is getting thinner and will leak faster. the 85 was knowen for this problem and not the best tractor in the MF line and parts are few when it comes to the hyd. sy.

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txblu

09-21-2004 12:04:03




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 Re: another lift question in reply to marlowe, 09-21-2004 04:02:16  
don't forget the viscosity of the oil gets thinner when heated and that pumps faster.

Mark



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gator

09-21-2004 20:12:22




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 Re: another lift question in reply to txblu, 09-21-2004 12:04:03  
is it possible that im just low on fluid,it is leaking a bit



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txblu

09-22-2004 06:41:37




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 Re: another lift question in reply to gator, 09-21-2004 20:12:22  
That'l certainly do it. My experience with ag gearboxes i.e. hydraulic in particular, is the full mark is a good place to start filling. I run all of them over full (bout as far as the distance between F and A on the dipstick) and the hyd seem to work much better.

Mark



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Mike(Sweden)

09-21-2004 02:16:27




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 Re: another lift question in reply to gator, 09-20-2004 21:05:21  
Your lift-system needs a overhaul.

But you can try to change the oil to a single grade 50w or more.



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